chimerism

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chimerism

 [ki´mer-izm]
the state of being a chimera; the presence in an individual of cells of different origin.

chi·me·rism

(kī-mēr'izm),
The state of being a chimera.

chimerism

(kī-mîr′ĭz′əm, kī′mə-rĭz′-)
n.
The condition of being a genetic chimera.

chimerism

[kimir′izəm]
a state in bone marrow transplantation in which bone marrow and host cells exist compatibly without signs of graft-versus-host rejection disease.

chimerism

the state of being a chimera; the presence in an animal of cells of different origin, e.g. XX/XY chimerism.

blood chimerism
twins that have a common circulation develop immune tolerance. Each of them is then a chimera. When the twins are of opposite sex, the female twin may be a freemartin. Sterilization of the female is brought about by the transfer of H-Y antigen to the female gonad.